Is there anyone who has swapped a driveshaft in an 05-06 Stang? if so, how do you like it, have you taken it to the track yet? I would be curious to see times...

 

Basically your drive train is already restricted by a percentage. I don't know what that percentage is, some people say 13-18%, some say otherwise. The more you do to lower that percentage, the less strain on your engine so you should be 'freeing' up some of your BHP. How much will this lower your percentage? I'm not sure. Something that is lighter, stronger, and performs better will always be a wise choice to get. Personally I'd wait until prices dropped.